Brazeless joint for cycle framings



No. 6l9,556. Patented Feb. l4, I899. w. FRASER.

BRAZELESS JOINT FOB CYCLE FRAMINGS.

(Application filed Dec. 20, 1897.)

(No Model.)

WQMMM m: NOREIS PETERS cu. FHOTO-LATHDY WASHINGTON, n. c,

UNITED STATES PATENT OFFICE.

WIIJLIAMFRASER, OF BIRMINGHAM, ENGLAND.

BRAZELESS JOINT FOR CYCLE-FRAMINGS.

SPECIFICATION forming part of Letters Patent No. 619,556, dated February14, 1899.

Application filed December 20, 1897. $erial No. 662,641. (No model.)

To all whom it may concern.-

Be it known that I, WILLIAM FRASER, engineer, a subject of the Queen ofGreat Britain,residing at Dovedale School Road, Moseley, Birmingham, inthe county of Warwick, England, have invented a certain new and usefulBrazeless Joint for Cycle-Framings and such Like, (for which I haveobtained Letters Patent in Great Britain, No. 28,690, dated December 15,1896,) of which the following is a specification.

This invention relates to the construction of cycle-frames and also toother machines and constructional objects; and it consists of animproved mechanical device for connecting or joining up one tubular partto another or one tubular part to a bracket-lug orits equivalent in sucha manner that a perfect and permanent joining of the two parts is theresult.

The primary object of the invention is to obviate the brazing of theends of the tubular members into the sockets or junction lugs whenconstructing a cycle-frame. A brazed joint is an expensive device inconsequence of the same requiring to be afterward trimmed or dressed,but further than that the brazing process both softens and weakens thejoint just at the point where it should be strongest. Further, aluminiumtubes and fittings have been practically abandoned on account of theirinability of being satisfactorily brazed together. This invention is amechanical device for joining up such tubular and socketed parts capableof being easily fitted and of reducing the cost of the jointsconstruction. The same is set forth in the accompanying sheet ofdrawings, its chief parts being a tapered socket for receiving the endof the tube, a nipple-cone or ferrule for expanding the tube end withinthe said socket, and an actual locking means, all constructed andarranged in the particular manner hereinafter set forth.

In the sheet of drawings the invention is shown applied to one of thebottom bracketlugs of a cycle-frame, Figure 1 showing the joint made orthe parts'connected up, and Fig. 2 the joint before being made ortheparts separate. Figs. 3, 5,and4show, respectively, a transversesection of the socket part on the dotted line F, an end elevation of theend of the tube, and an end elevation of the nipple,

cone, or ferrule, the said figures showing the conical and parallelparts.

In this joint the bracket-lug ais formed upon its inside into a cone ortapered socket a the largest diameter being at the bottom of the saidsocket. The metal of the walls of the socket at its mouth a is of such anature to allow of its being closed in upon the tubular member of thejoint subsequent to the primary connection of the parts for looking theconnection, as shown in Fig. l. A hollow and cylindrical coned ferruleor nipple c of the same taper as the coned socket 03 and having acylindrical part 0 upon its one end ofa reduced diameter is adapted toloosely fit and seat itself within the socket 0. as aforesaid, and toabut against the bottom of the said socket. A curved shoulder cseparates the small diameter part c of the cone 0 from its largerdiameter-body, and when the said cone is within the socket this curvedshoulder comes adjacent to the sockets mouth. The coned ferrule ornipple c is of such a diameter as to leave between it and the socket awhen the said ferrule is seated therein a circumferential space of thesame thickness as the walls of the tubular part to be connected to thesaid socket.

The tubular member d of the cycle-framing, which is to be rigidly andpermanently connected to the lug a, has its connection end 01 formed ofa larger diameter than the tube itself, and the walls of this enlargedpart are longitudinally split for a short distance at 61 A curvedshoulder 01 connects the enlarged part d with the tube d, its formationbeing similar to the formation of the shoulder 01 of the ferrule ornipple c. The walls of the enlarged part 61 are parallel before beingintroduced into the socket a and over the nipple or ferrule.

To make the joint from the parts, as shown in Fig. 2, first introducethe coned ferrule 0 into the coned socket a by way of its mouth. Thenforce by suitable pressure the enlarged end 01 of the tube 01 into thespace between the sockets inner walls and the circumference of the conedferrule until the curved shoulder d of the tube comes against the curvedshoulder c of the cone 0, the lug a being held all the time in a jig.This forcing in of the enlarged split tube opens out or expands the saidenlarged end, forcing it to conform to the taper of the socket andtheconed ferrule and to be wedged between them. By I a suitable tool themetal a at the mouth of the coned socket a is now spun or closed overthe curved shoulder d of the tube cl, which prevents any possibility ofthe tube being withdrawn.

As an extra precaution against the joint becoming loosened a cross-peg emay be driven through the parts, or the parts may be looked as follows:

The tube 01 is laid hold of by gas-pliers or the like and given a slightback-and-forth ro- In a mechanical joint, the combination of a conicalsocket part a of a larger diameter at its bottom than at its mouth, aconed nippie or ferrule a seated within the said socket and looselyfitting the same so as to leave a circumferential space between it andthe said socket, the said cone also having a reduced part c and a curvedshoulder 0 and a tube d, having an enlarged split end all and a curvedshoulder (1 forced into the circumferential space between the conedsocket and the nipple or ferrule c, and having its split end expandedand closed in by the said socket, substantially as described.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

WILLIAM FRASER.

Witnesses:

GEO. AVERY, A. F. BIDDLE.

